A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Home to items never before seen by the public.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

One devoted couple has donated multiple recreations of Michelangelo's sculptures to this South Dakota town.

Moonbows over Kentucky.

The world's longest known cave system.

A castle built by an eccentric medieval enthusiast in rural Ohio.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

A tribute to Ponce de Leon's supposed quest for eternal youth.

A swamp that was the site of prehistoric water burials also managed to preserve its corpses for millennia.

A building so large that it has its own weather.

"The Most Boring Road in the State."

This lighthouse and shipwreck museum keep a torch burning for the memory of the SS Edmund Fitzgerald.

This freshwater spring fills with 10,000 gallons of water per minute.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

A Northwoods sporting competition that shows lumber jacks doing much more than cutting down trees.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Full-sized barn houses many restored instruments.

A quarter-scale locomotive wonderland built by one man and his family.

World's largest Christmas store.